Stereo Woofer/Loudspeaker

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This is a mini 2 channels 3w amplifier with PAM8403. It is perfect for MP3/MP4/notebook. And you could also power the board with 5V USB power supply. 1. Power supply: DC2.5-5.5 V. 2. Output power: 3W + 3W (4Ω). 3. SNR: 90dB. 4. Efficiency: > 90%. NOTE: 1. Single lithium battery or USB power supply is suitable, also can use four sections of 1.5V battery, if use with the transformer...This is a mini 2 channels 3w amplifier with PAM8403. It is perfect for MP3/MP4/n...